body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f4f4f4;
    color: #333;
    height: 100vh;
}

header {
    background-color: #3498db;
    color: #fff;
    padding: 1em 0;
    text-align: center;
}

header h1 {
    margin: 0;
}

main {
    padding: 20px;
    max-width: 800px;
    margin: 20px auto;
    background-color: #fff;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.container {
    background: #fff;
    padding: 40px 30px;
    border-radius: 10px;
    box-shadow: 0 2px 12px rgba(0,0,0,0.08);
    text-align: center;
}
h1 {
    color: #333;
    margin-bottom: 16px;
}
p {
    color: #666;
    margin-bottom: 32px;
}
.btn {
    display: inline-block;
    padding: 12px 32px;
    margin: 0 10px;
    background: #3498db;
    color: #fff;
    border: none;
    border-radius: 5px;
    font-size: 16px;
    cursor: pointer;
    text-decoration: none;
    transition: background 0.2s;
}
.btn:hover {
    background: #217dbb;
}

footer {
    text-align: center;
    padding: 20px;
    margin-top: 40px;
    background-color: #3498db;
    color: #fff;
    font-size: 1.0em;
}

@media (max-width: 480px) {
    .btn {
        width: 100%;
        padding: 12px 0;
        margin: 10px 0;
    }
}

main {
    padding: 20px;
    max-width: 600px;
    margin: 20px auto;
    background-color: #fff;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

/* 响应式调整 */
@media (max-width: 480px) {
    .container {
        padding: 30px 15px;
    }
    
    h1 {
        font-size: 1.8rem;
    }
    
    .btn {
        width: 100%;
        padding: 12px 0;
    }
}